Baby Girl Arden Rose?

Hi all, I have been reading Nameberry for a few years and just joined today. We are not finding out if we are having a boy or girl until the birth, so we are deciding on names for both. We have our boy name chosen for a long time. But our girl name is proving difficult for me. I originally suggested the name Arden for a girl name to my husband and he loved it, and seems to have his heart set on it. I loved it too before I got pregnant and now that I am, I feel not as confident. I am not sure if its just the pregnancy hormones! The other name I suggested to him is Ava, which I know is super popular even in Australia where we live. We both do love that Arden is not popular, but actually we have both never heard this name on anyone so its difficult to imagine. The other thing I am not sure on is a nickname for Arden. I love that both names have references to birds.